Bellwork: 8/15/2013 Bellwork Questions: What do you think the letters: “m”, “L” and “g” represent? What do you think “cm” could be? “mm”? “km”?

Abbreviating Symbols When writing out the symbols to represent the metric system… Consider the unit Write the prefix Put the two together and… Wah-lah!  Prefixes: Kilo- = k Hecto- = h Deca- = D Deci- = d Centi- = c Milli- = m Units: Meter = m Liter = L Gram = g

Practice Abbreviating Symbols Dm Dekameter = ____ Centigram = ____ Kiloliter = ____ Millimeter = ____ cg kL mm

Okay, so the Metric System is awesome… how can I remember it? Kilo- Hecto- Deca- BASIC UNIT Deci- Centi- Milli- Kittens Hate Dogs BECAUSE Can’t Meow Other mnemonics… Kids Have Dropped over Dead Converting Metrics King Hector Died by Drinking Chocolate Milk

How to use The Metric Ladder Step 1: Determine if you are converting to a larger or smaller unit Large  Small, move RIGHT Small  Large, move LEFT Step 2: Decide how many spaces you need to move on the ladder Step 3: Move your decimal point that many spaces!

Converting Large to small numbers Practice Problem: 1.0 m= ? cm Step 1: (Determine if you are converting to a larger or smaller unit) You know the LARGER unit (1 m), but do not know the SMALLER unit (cm) Since you are moving from a large to a small number, move to the RIGHT Step 2: (Decide how many spaces you need to move on the ladder) From meter  centimeter, there are 2 spaces Step 3: (Move your decimal point that many spaces!) Move your decimal point 2 place values to the right 1.00m  100.0 cm

Converting Small to large numbers Practice Problem: 3.0 cg= ? Dg Step 1: (Determine if you are converting to a larger or smaller unit) You know the smaller unit (3 cg), but do not know the larger unit (Dg) Since you are moving from a small to a large number, move to the LEFT Step 2: (Decide how many steps you need to take on the ladder) To go from centigrams  decagrams takes 3 steps Step 3: (Move your decimal point that many spaces!) Move your decimal point 3 place values to the left 3.0 cg  0.003 Dg

Practice Problems 12 km = _____ m 3 Dg = _____ g 1 mL = _____ L 45 dm = _____ m 2 dL = _____ DL 7,220 cm = _____ hm Questions to ask yourself: Are you going to a smaller or larger unit? Which way will you move the decimal? (smaller-right; larger-left) How many spaces do I move? (Use the Metric Ladder to help)

Practice Problem sOlutions 12 km = _____ m 3 Dg = _____ g 1 mL = _____ L 45 dm = _____ m 2 dL = _____ DL 7,220 cm = _____ hm 12,000 30 0.001 4.5 0.02 0.722

Practice Problems Use the next 10-15 minutes to complete the Metric Conversion worksheets